Boring and reaming machine.



No. 726,662. PATENTED APR. 28, 1903.

I G. A. ENSIGN. BORING AND REAMING MACHINE.

APPLIUATION FILED Nov. 11, 1902. no MODEL. 4 sums-sum: 1. a

- INVEN'TOH WITNESSES:

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N06 726,662. PATENTED APR. 28, 1903.

1 G. A. ENSIGN. BORING AND REAMING MACHINE.

APPLIUATION FILED NOV. 17, 1902.

no MODEL. 4 SHEETS-SHEET 2.

W/TNESSES: I WVENTOH w 'gffy ZE 71-5-2772 6 ATTORNEYS.

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No. 726,662. I PATBNTED APR. 28, 1903.

G. A. ENSIGN.

BORING AND BEAMING MACHINE.

APPLIOATIOH IILED NOV. 17, 1902. no MODEL. 4 SHEETS-SHEET '3.

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PATVENTED APR. 2s, 1.903.

G. A. BNSIGN. BORING AND REAMING MACHINE.

APPLICATION FILED NOV. 17, 1902.

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N0 MODEL.

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ATTOH'NE rs.

UNITED STATES GEORGE A. ENSIGN, OF DEFIANOE, OHIO, ASSIGNORTO DEFIANOE MACHINE WORKS, OF DEFIANOE, OHIO.

BORING AND REAMING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 726,662, dated April 28, 1903.

Application filed November 1'7l 1902. Serial No. 131,666. (No modeLl allow of first boring the work and then reaining it without removing the Work from the work-holder, and insure the formation of'an accurate hole.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the im-' proveinent as arranged for boring and reaming heavy work. Fig. 2 is a plan view ofthe same, the parts being in position for boring. Fig. 3 is a transverse section of the same on the line 3 3 of Fig. 2. g of the same, showingthe work-holder in position for reaming. Fig. 5 is a plan view of part of the improvement, showing the work-j holder for light work. Fig. 6 is a front ele-v vation of the same, and Fig. 7 is an end view of the same.

A head-stock A, secured to a bed B, is provided with suitable bearings for parallel longitudinally-extending spindles O and D, carrying pulleys E and E, respectively, connected by belts with other machinery for imparting a continuous rotary motion to the said spindles. forward end a chuck or like tool-holder C for a tool F, anda chuck D is on the forward end of the spindle D and carries a reamerG, designed for reaming a hole H, boredby the boring-tool Fin the work H, held on a workholder I.

The work-holder I (shown in Figs. 1, 2,3, and 4) consists, essentially, of a pair of self- Fig. 4 is a similarview The spindle O carries at its centering V-shaped jaws J and J, mounted to slide toward or from each other on suitable guideways formed vertically on a bracket K, bolted or otherwise secured to the top of a slide L, mounted toslide transversely on a guideway N, formed on a carriage N, having longitudinal movement on the guideway B of the bed B. The jaws J and J are simultaneously moved toward or from each other to clamp or disengage the work H, and for this purpose a screw rod J is provided, mounted to turn in a suitable bearing K, (see Figs. 3 and 4,) formed on the bracket K, and the said screw-rod J has right and left hand threads screwing in the jaws J-and J,- so that on turning the screw-rod the jaws are caused to slide'toward and from each other, according to the direction in which the screwrod J is turned. A handle J in the shape of a handled wheel is secured on the upper end of the screw-rod J to permit the operator to conveniently turn the screw-rod for the purpose above described.

In order to bring the work H into the proper longitudinal position on the jaws J and J, a stop J is provided, mounted to slide on a rod J bolted or otherwise secured to the forward end of the jaw J, and the said stop J after the desired adjustment ismade is secured in place on the rod J 5 by a suitable set-screw .J

When the jaws J and J are in an open position, then the operator places the work H in position on the lower'jaw J and moves the work forward nntilits front end abuts against the stop J and then theoperator turns the handle J to move the jaws J and J toward each other, so that the work is clamped and self-centered in the jaws J and J.

A slide L is provided at its front and rear ends with adjustable stops L and L preferably in the form of screw-rods, as plainly indicated in Figs. 3 and 4, the inner ends of the stops being adapted to abut against lugs N and N respectively, formed or secured on the top of the carriage N. The stopslL and L are made adjustable to compensate forany wear of the stops and the lugs N N against which the stops abut, so that the slide is moved into the correct position to bring the longitudinal center of the jaws J J and the work therein into exact alinement with the boring-tool F and reamer G to allow accurate boring of the hole and exact reaming thereof. It will also be seen that in case it is desired to bore in the work a hole eccentrically relative to the longitudinal center of thejaws J J then the stops L and L are correspondingly adjusted to bring the work into the desired position relative to the boring-tool and the reamer.

When it is desired to bore a hole in the work H by the boring-tool F, then the slide Lis moved into the position shown in Fig. 3- ihat is, until the stop L abuts against the lug N --and when it is desired to ream the hole H, bored in the work 1-1 by the boring-tool F, then the operator moves the slide L transversely into the position shown in Fig. 4- that is, until the stop L abuts against the lug N When the slide L is in this position, the hole H in the work is in axial alinement with the reamerGr, so thatthe latter can ream the hole on the forward movement of the tool-holder.

The bracket K is provided with an opening K for the passage of the reamer G at the time the slide L is in the position shown in Fig. 3 and the hole is bored by the boringtool F in the work H.

In order to impart a longitudinal sliding motion to the carriage N and the parts supported thereon, the following device is provided: On one side of the bed B is secured a rack O, in mesh with a pinion O, secured on the inner end of a transversely-extending shaft 0 journaled in a bearing N attached to the carriage N. On the outer end of the shaft 0 is secured a hand-wheel 0 under the control of the operator for imparting a turning motion to the shaft 0 so as to cause the pinion O to roll over on the rack 0, so that a forward or backward sliding motion is given to the carriage N--that is, according to the direction in which the hand wheel 0 is turned. The forward sliding motion of the carriage N is limited by stops P, held longitudinally adjustable in a bracket P. secured to the bed B at the inner end of the guide way B.

The operation is as follows: Vhen the work H is secured between the jaws J and J, as above described, and the slide L is in the position shown in Fig. 3, then the operator turns the hand-wheel 0 so as to feed the carriage N inward, and thereby bring the work H to the boring-tool F for the latter to bore the hole H centrally in the work H. Then the carriage N abuts against the stops P, then the hole H is bored through the work H and then the operator turns the handwheel 0 in a reverse direction, so as to run the carriage N back to its starting position. The operator then pushes the slide L transversely until the stop L abuts against the lug N (see Fig. hand-wheel 0 so as to feed the carriage N inwardly to bring the work H to the reamer 4,) and again turns the.

tion to move the carriage N and the parts thereon back to an outermost position. The operator now turns the hand-wheel J so as to open the jaws J and J to allow of removing the work H and of substituting a new piece, after which the hand-wheel J is turned in the opposite direction to close the jaws J and J to securely clamp the work in position. The operator now turns the slide L back to its originalposition (shown in Fig. 3) and then feeds the carriage N forward by turning the hand-wheel O to bore the hole H in the work by the boring-tool F. The above-described operation is then repeated. A brush Q, held on a suitable stand Q, attached to the slide L, is connected by a hose Q with a suitable water-supply Q and this brush Q, stands in the path of the boring-tool F and the reamer G, according to the position of the slide L, so as to keep the said boring-tool F and the reamer G always in a cool condition.

It is understood that the tool-holder I, having the self-centering clamping-jaws J and J, is used only for heavy work; but when it is desired to bore and ream holes in light work then the tool-holder shown in Figs. 5, 6, and 7 is employed.

On the slide L, in place of the bracket K, is secured a plate R, having in its top a longitudinallyextending V-shaped groove or self-centering jaw R for the work to rest in, and above the said jaw is located a clamp S for engaging the top of the work H to clamp it in place on the jaw R. The clamp S is preferably in the shape of a disk, mounted eccentrically on a stud S,secured in a bracket E extending upwardly from the rear side of the jaw R, and the said disk is provided with a handle S adapted to be taken hold of by the operator for-imparting a turning motion to the disk S, so as to move the same with its peripheral face in or out of contact with the top of the work 1-1 to clamp the latter in the jaw Ror to release the work after the hole is bored and reamed.

In order to impart a quick sliding motion to the carriage N, the bracket N ,with its shaft pinion O, and hand-wheel O is removed from the carriage N, and instead of this mechanism a hand-lever T is employed, engaging a loop N on the carriage, the lever being fulcrumed at its rear end on a pivot T, removably secured in a socket '1' by a set-screw T the socket being formed on the top of a support T preferably made in sections bolted together and adj ustably held on a guideway U, extending longitudinally on the rear side of the bed B. The guideway U is provided with heads U, engaging the outer ends of rods U and fastened thereto by set-screws U and the' said rods U are held to slide transversely in bearings B extending from the rear side of the bed B. Set-screws B serve to fasten the rods U in place in the bearings 13*. (See Figs. 3 and 4..) Now by the arrangement described it is only necessary for the operator to impart a swinging motion to the lever T to move the carriage quickly inwardly for boring and reaming the hole, as previously described, or to move the carriage back again into an outermost position. The support T on which the lever T is fulcrumed, is adjustably secured on the longitudinal guideway U to permit of bringing the carriage N nearer to or farther from the boring-tool F and reamer G, according to the length of the work under treatment-that is, if the work is short the carriage is moved nearer to the boring-tool and the reamer-and the support T is correspondingly adjusted on the guideway Uthat is, moved nearer to the head-stockand then secured in place on the support, and if the work is long the carriage is moved outward and the support correspondingly adjusted on the support U, so that the lever T is always in proper position relative to the carriage N. The guideway U is held transversely adjustable to allow the use of along lever T in case the work is of considerable length, and it requires a long sweep of the lever T to feed the carriage the desired distance. It is understood that it is very desirable to have the handle end of the lever T always stand within convenient reach of the operator, and this position of the lever is readily obtained by adjusting the support T longitudinally on the guideway U and the latter transversely on the rods U attached to the bed B. It is understood that the slide L is shifted, as previously explained, to bring the work into boring or reaming position.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A boring and reaming machine having a work-holding carriage and a feeding device for the carriage, the feeding device comprising a transversely-adjustable guidewayextending in the direction of the movement of the said carriage, a pivot lengthwise adjustable on the said guideway and a hand-lever connected with carriage and fulcrumed on said pivot, as set forth- 2. A machine of the class described provided with a work-holder comprising a vertically-disposed bracket, a pair of self-centering jaws mounted to slide toward and from each other on the said bracket, 2. screw-rod for opening and closing the said jaws, a rod extending from the forward end of the lowermost jaw and a stop held lengthwise adjustable on the said rod, and arranged to engage the end of the work, as set forth.

3. A machine of the class described having a bed provided with a guideway, a carriage mounted to slide thereon, a second guideway parallel to the said bed-guideway and transversely adjustable thereto, a pivot lengthwise adjustable on the said second guideway, and a lever fulcrumed on the said pivot and engaging the said carriage, to move the lat- .ter forward and. backward on the bed-guideway, as set forth.

4. A machine of the class described pro- I vided with a feeding device for the carriage, comprising a transversely-adjustable guideway extending lengthwise in the directionof the movement of the carriage, a pivot lengthwise adjustable on the guideway, and a lever fulcrumed on the pivot and connected with v the carriage, to move the latter forward or backward, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE A. ENSIGN. v

Witnesses:

GEO. W. DEATRICK, J os. BAUER. 

